source: tests/concurrency/pthread/pthread_demo_create_join.cfa@ 33807a1e

#include <fstream.hfa>
#include <thread.hfa>
/* test pthread create/join/exit */

int arr[20];

void* fetch(void* idx){
    int res = arr[(uint64_t)idx];
    pthread_exit((void*)res);
    sout | "it should not be here";
    exit(1);
    //return (void*)res;
}

void arr_init(){
    for (int i = 0; i < 20; i++){
        arr[i] = i;
    }
}

int main(int argc, char const *argv[])
{
    pthread_t threads[20];
    arr_init();
    int status;
    for (int i = 0; i < 20; i++){
        status = pthread_create(&threads[i], NULL, fetch, (void*)i);
        if (status != 0) exit(1);
    }
    int res = 0;
    for (int i = 0; i < 20; i++){
        void* _res = NULL;
        status = pthread_join(threads[i], &_res);
        if (status != 0) exit(2);
        if (((uint64_t)_res) != i) exit(3);
        res += (uint64_t)_res;
    }
    sout | "final res is" | res;

    return 0;
}